Matter 2

Wes put a small spoon of sugar in a cup of hot water and stirred. What happened to the sugar? This is a physical change.

• It dissolved

• It stayed on the bottom of the cup

• It evaporated

• It changed color

You poured salt water in a shallow tray & left it outside on a sunny, hot day. What could remain in the dish after a long time?

• dry salt

• water with no salt

• the same salty water as before

• nothing

Which answer makes a correct statement?

• physical change only changes the size

• physical change only changes the color

• physical changes begin & end with the same matter

• physical changes change the matter into something totally different

Some children are making mud pies. They cut the mud pies in half. Is this a chemical or physical change.

• chemical

• physical

Is tearing paper an example of a chemical or physical change?

• chemical

• physical

If you break a piece of glass, the shapes of the glass changes, but the properties in the fragments remain the same. Which of the following has occurred?

• chemical

• physical

Which of the following is an example of the formation of a mixture & a physical change?

• rust forming on an iron nail

• sodium & chlorine forming table salt

• sugar crystals dissolving in water

• hydrogen & oxygen reacting to produce water

Materials combine chemically or physically. Which materials form a new substance when chemically combined?

• salt & pepper

• water in sugar

• iron nails & pennies

• baking soda & vinegar

Which of the following examples is evidence of a physical change?

• a popsicle melts on the table

• copper turns green over time

• an electrical current splits water into hydrogen & oxygen

• baking soda & vinegar

Sarah puts a tray of ice on the table and it melts. This is an example of a

• physical change

• chemical change